function s1_hello(){
echo "hello, world"
}
function s2_tell_who_i_am(){
whoami
}

function s3_which_distro_do_i_use(){
grep '^NAME=' /etc/*-release | awk -F '"' '{print "NAME=\""$2 "\""}'
}
function s4_view_my_cpu_arch(){
uname -m
}

function s5_show_first_scsi_disk_size(){
lsblk -l |grep disk |grep 'sda' |awk '{match($4,/[0-9]+/,arr);print arr[0]}'
}

function s6_show_main_memory_size_in_megabytes(){
free -m |awk '/Mem:/ {print $2}'
}

s1_hello
s2_tell_who_i_am
s3_which_distro_do_i_use
s4_view_my_cpu_arch
s5_show_first_scsi_disk_size
s6_show_main_memory_size_in_megabytes

